1 #ifndef __LINUX_NET_AFUNIX_H
2 #define __LINUX_NET_AFUNIX_H
3 extern void unix_proto_init(struct net_proto *pro);
4 extern void unix_inflight(struct file *fp);
5 extern void unix_notinflight(struct file *fp);
6 typedef struct sock unix_socket;
7 extern void unix_gc(void);
8 extern void wait_for_unix_gc(void);
9 
10 #define UNIX_HASH_SIZE	256
11 
12 extern unix_socket *unix_socket_table[UNIX_HASH_SIZE+1];
13 extern rwlock_t unix_table_lock;
14 
15 extern atomic_t unix_tot_inflight;
16 
first_unix_socket(int * i)17 static inline unix_socket *first_unix_socket(int *i)
18 {
19 	for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
20 		if (unix_socket_table[*i])
21 			return unix_socket_table[*i];
22 	}
23 	return NULL;
24 }
25 
next_unix_socket(int * i,unix_socket * s)26 static inline unix_socket *next_unix_socket(int *i, unix_socket *s)
27 {
28 	/* More in this chain? */
29 	if (s->next)
30 		return s->next;
31 	/* Look for next non-empty chain. */
32 	for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
33 		if (unix_socket_table[*i])
34 			return unix_socket_table[*i];
35 	}
36 	return NULL;
37 }
38 
39 #define forall_unix_sockets(i, s) \
40 	for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
41 
42 struct unix_address
43 {
44 	atomic_t	refcnt;
45 	int		len;
46 	unsigned	hash;
47 	struct sockaddr_un name[0];
48 };
49 
50 struct unix_skb_parms
51 {
52 	struct ucred		creds;		/* Skb credentials	*/
53 	struct scm_fp_list	*fp;		/* Passed files		*/
54 };
55 
56 #define UNIXCB(skb) 	(*(struct unix_skb_parms*)&((skb)->cb))
57 #define UNIXCREDS(skb)	(&UNIXCB((skb)).creds)
58 
59 #define unix_state_rlock(s)	read_lock(&(s)->protinfo.af_unix.lock)
60 #define unix_state_runlock(s)	read_unlock(&(s)->protinfo.af_unix.lock)
61 #define unix_state_wlock(s)	write_lock(&(s)->protinfo.af_unix.lock)
62 #define unix_state_wunlock(s)	write_unlock(&(s)->protinfo.af_unix.lock)
63 
64 #endif
65